1,2（x-3）=5.8 2、 13（x+5)=169

x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x （1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) (x/x-1)+(5x-2)/x*x-x=1 求x（有图） x(x^2-1)+2x^2 *(x+1）-3x*(2x-5)=x(3x^2-4x)-28 6/（x+1）=(x+5)/[x(x+1)] (3-x)/(x-4)+1/(4-x)=1 2/(1+x)-3/(1-x) 5x-3（2x+1）=6x-4（5-3x)求x (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1 y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),